I think they plan 1.6.3 to be the last release before 1.7
But maybe, if there are still many bugs or any serious security bug, they will probably put out a 1.6.4 before the release of 1.7 in July.
Let's hope so.

I followed the steps above and am still having the messed up breadcrumbs on my 1.7 site when either type of cache is enabled. I had disabled cache as a workaround, but now my host is complaining about excessive cpu usage. Any other ideas of things to try or is this a known 1.7 bug?

----update----
Ended up fixing this by turning cache off in the breadcrumbs module itself, then turning site cache back on

infograf768 wrote:Should work now on the test site.
Cleared cache, disabled system cache. Displayed site. Moved the plugin System cache to bottom of manager (i.e. loading last). Re-activated it. Re-cleared cache.
Should be OK now.

Can you tell how to move the plugin in the bottom of the manager? I can move it down as part of the type "System", but below - no way.

sdk19852 wrote:Issue persists in 2014 (also on 3.3). Also tried using Jotcache AND cache plugin is positioned last.

Yep, same here. On my kunena forum page I get a breadcrumb that tells me I'm not in the Index but inside a certain forum thread. I don't understand how some of these huge and obvious bugs makes it into the Joomla releases and persist over several years. Maybe someone will finally fix it now then?

Turning off caching for the Breadcrumbs module (in advanced settings for the module) does seem to fix it though.

As mentioned by Hugg the Breadcrumbs module cache is normally the culprit especially if you find it is working correctly after clearing your Joomla cache.

Just open up your Breadcrumbs module options and then under Advanced set Caching to No caching then save your module and of course clear your current Joomla cache to allow it to catch up.

On a side note for Admins if you are finding it a drag to head over and clear your cache when you are making small changes I highly recommend get NoNumbers Cache Cleaner it places an easily accessible button through out the Admin area allowing you to clear your cache with one click with out having to leave what you are working on.